<?php
    define('DB_HOST','localhost');
    define('DB_USER','hingsli');
    define('DB_PASS','123456');
    define('DB_NAME','review_app');
$conn = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
if ($conn->connect_error){
    die("连接失败".$conn->connect_error);
}
echo "连接成功！";